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PRL Motorsports

High Efficiency Downpipe w/ 5-Inch GESI G-Sport Catalytic

$1,049.00 $999.00 Save $50.00

SKU: TSP-HCR-HEDP

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The PRL Motorsports High Efficiency Downpipe is an exhaust upgrade designed to increase engine efficiency for Honda's 2.0L turbo engines. It promotes optimal airflow with minimal turbulence.

The downpipe features investment-cast 304 stainless steel ends and a 5.00" OD, 400 CPSI GESI G-Sport catalytic converter. This GESI converter was custom-developed for Honda 2.0T applications to meet emissions standards while optimizing exhaust flow. All components are fully back-purged to handle high exhaust gas temperatures.
Show original supplier description
The PRL Motorsports High Efficiency Downpipe is engineered to maximize performance from Honda's 2.0L turbo engine by promoting optimal airflow and reducing turbulence. This upgrade is considered one of the most effective modifications for increasing engine efficiency. The downpipe is constructed with 304 stainless steel investment cast ends and features a custom-developed 5.00" OD, 400 CPSI GESI G-Sport catalytic converter. This specialized converter was co-developed with GESI specifically for small displacement direct injection Honda engines, ensuring compliance with emissions standards while enhancing exhaust flow. The components are fully back-purged to withstand high exhaust gas temperatures. The wide cast inlet smoothly merges turbine and wastegate gases, reducing restriction, while the cast outlet provides a smooth taper to connect with factory or most aftermarket front pipes. An O2 sensor harness extension is also included. This downpipe fits a wide range of vehicles, including all 2017-2021 FK8 and 2023+ FL5 Civic Type-R models, 2023+ Acura Integra Type S 2.0T, all 2018+ Accord 2.0T, Acura RDX 2.0T, and Acura TLX 2.0T (excluding TLX Type S). It is also compatible with RHD and international models. Notably, no ECU calibration or tune is required, and the use of this downpipe will not result in a check engine light. However, this product cannot be shipped to California.
Vehicle Symptoms
  • Check engine light on after turbo upgrade
  • Loss of power under hard acceleration
  • Exhaust smells like rotten eggs
  • Whistling or rattling noise near downpipe area
  • Catalytic converter efficiency code after mods
Diagnostic Codes
  • P0420 – Cat Sys Efficiency Below Threshold (B1)
Relevant Conversations
  • Best downpipe for Civic Type R FK8 turbo
  • PRL Motorsports downpipe vs catted vs catless
  • How to fix P0420 after downpipe install
  • Downpipe installation guide Honda 2.0T
  • Will GESI G-Sport cat pass emissions?
  • Downpipe with high flow cat vs stock restriction
  • PRL downpipe review 2024
  • Civic Si downpipe upgrade without tune
  • Check engine light after downpipe fix
  • P0420 on Honda with aftermarket downpipe

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandPRL Motorsports
Part NumberTSP-HCR-HEDP
CategoryExhaust
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